Electric lamp and the like and its mounting and electrical connection



June 25, 1935. L H. D. BLAKE 2,006,155

ELECTRIC LAMP AND THE LIKE AND ITS MOUNTING AND ELECTRICAL CONNECTION Filed April 21,1933

.Z'NVENTUR FAR. ULEEELAKE,

Hz 5 AT TURKEY.

especially to the mounting of such devices and to' Patented June 25, 1935 PATENT OFFICE ELECTRIC LAMP AND THE LIKE AND ITS MOUNTING AND ELECTRICAL CONNEC- TION Harold D. Blake, Cleveland Heights, Ohio, as-

signor to General Electric Company, a corpo-.

ration of New York Application April 21, 1933, Serial No. 667,223

8 Claims.

My invention relates to electric incandescent lamps, photoflash lamps, radio tubes, and other similar devices including an electric energy translation element in a glass bulb or envelope, and

their electrical connections.

At present, electric lamps and the like, including radio tubes, are commonly provided with hollow bases into which the bulb end or seal portion is inserted and cemented; the base embodying terminals or contacts connected to the filament(s) or other translation element(s) within the bulb. Such bases and the sockets to receive them occupy more space than is sometimes desirable; and in the case of radio. tubes, especially, they are rather complicated and expensive structures. Moreover, the cementing, baking, and soldering involved in basing a bulb make it a troublesome and costly operation. 1

I provide for the mounting and electrical connections of electric lamps and the like without necessity for bulky bases, as by means, such as securing and comiective arms or wings, preferably embodied in comparatively thin, fiat mount ing and connective devices or bases afixed to the bulb end. Arranged to abut against the bulb end, as I prefer to apply it, such a fiat disc-like structure can be secured thereto required in ordinary bas methods of uniting to gig for such a structure-incl ding the use of various adhesives, well as QL sealing of glass to certain. meta fusion or thermal softening of glass. Such a mounting and connective de (eioecially when of suitable metal, such oy containing about twenty-five per mercially Allegheny 55) may even form the end wall oi? t or envelope, in lieu of glass,- although in resent instance I have shown an envelope ent walled with glass.

Various other features and advantages or" my invention will appear from the following description of species thereof, and from the drawing.

in the drawing, Fig. 1 is a perspective view of a photofiash lamp having the base of my invention; Fig. 2 is a vertical section through a portion thereof; Fig. 3 is asirnilar section through a modification; Fig. i is a perspective view of a holding device or socket for the base shown in Figs. 1, 2, and 3; Fig. 5 is a perspective view of a portion of a lamp showing a modified base of my invention having three terminals; Fig. 6 is a perspective view of a radio tube having another species of the 1 base of my invention; Fig. '7 is a side elevation thereof, partially in section; Fig. 8 is a plan view of a holding device of socket for the radio tube base; and Fig. 9 is a section on an enlarged scale along line 9-4 of Fig. 8.

Figs. 1 and 2 show my invention applied to a photo'flash lamp of the type disclosed in U. S. patent to Ostermeier Re. 18,678, reissued December 6, 1932, comprising a glass bulb l0 containing metal foil H, and having an inward extending glass tube stem l2 of the so-called tipless variety. The stem I2 here illustrated is of the type disclosed in U. S. patent to Mitchell and White No. 1,423,956, granted July 25, 1922, having a flattened press portion 13 through which the cur rent leads l4 and [5 are sealed, and also having an exhaust tube it inside the main stem tube l2, attached to the press 13 and opening there through at El into the interior of the bulb Ill.

The exhaust tube 16 extends outward through the main stem tube l2 to the sealed end l8, which preferably projects from the end l8a of the bulb it as a stud or spur. (However, it is to be understood that such a projecting stud or spur on the end of the bulb it might be provided in some other way,especially in the case of an oldfashioned bulb-tipped lamp,--or might even be dispensed with.) Preferably, the bulb end ltd (formed by the usual stein tube flange and the end of the bulb neck to which this flange is sealed in manufacture) is molded or otherwise shaped to a regular form such as best shown in Fig. 2, presenting a fairly fiat end surface, square with the bulb axis and or substantial radial width. Against this end surface is seated my mounting and connective device is, shown as a fairly stiif round disc of insulating material like fiber or high-grade cardboard, or Bristol board, with a snug-fitting center hole at for the stud it. Openings ill for thc respective leads i l and it are formed as slits extending out from the hole 2i! about even with the inner wall of the stem tube 12. The disc it has diametrically opposite wings or arms 22, projecting outward from its generally circular periphery beyond the periphery of the bulb end lta, in line with the slits 2i. The disc it may be fastened to the fiat bulb end surface at 123a with any suitably strong adhesive or glue that sticks well to glass. In this particular instance a material manufactured by the Gen eral Electric Company under the trade name Glyptal and numbered 1276 is used. The leads l4 and 15 are passed through the disc opening and drawn outward into the slits 2! when the disc 19 is ready to be applied; and after it has been glued to the bulb end i8a, the leads are drawn tight and bent to extend outward along the I bottom surfaces of the wings22, 23 to their ends, where they may be secured by doubling or hooking them around the wing ends in notches 24. The notches 24 fit tightly with said wires and tend to retain them in place. The portions of the 4 leads l4, IS on the wings 22,23 serve as lateral" lies all in one plane substantially square with the bulb axis. V

Fig. 4 shows a holding device or socket for a lamp such as shown in Figs. 1-3. This socket device comprises an insulating base plate 25 (as of rubber) with a pivot hole or socket 26 to take the pivot stud I 8, and with diametrically opposite spring clips 21, 28 to receive and hold (grip) the mounting wings 22, 23, and make electrical connection to the wing contacts. The. lamp is mounted in this device by inserting its stud I8 in the hole 26 with the wings 22, 23 indexed to fall between the clips 21, 28, and then turning the lamp clockwise till the wings force apart the resiliently separable clip legs and enter between them. The upper clip legs have shoulders 29 to limit entry of the wings into the clips, and forward-bevelled latch-ends with rearward bevelled shoulders 38 to prevent the lamp wings 22, 23 from jarring out of the clips. Between the clips 21, 28 the base plate 25 has a diametral protuberance 3| to engage against the disc l9 and at least compensate for the thickness of the lower clip legs, soas to prevent the lamp from vibrating or oscillating in the socket device.

Fig. 5 shows my invention applied to a lamp or the like which may contain two filaments or translation elements. Accordingly, the disc l9a has three wings or arms 22, 23, and 32-corresponding to the three leads l4, l5 and 33. In this instance, the construction of Figs. 1-3 is supplemented with contact clamps or strips 34, extending across the wings 22, 23, 32 over their current leads l4, I5, 33, with the strip ends bent around under the wings, so as to grip and secure the leads. The clamps 34 serve as. the lateral wing contacts. Except as otherwise indicated, the construction corresponds to that of Figs. 1 and 2-.

, This lamp of Fig. 5 may be mounted in a socket device (not shown) similar to that of Fig. 4, but provided with another contact clip for the additional wing 32.

Figs. 6 and 7 show the application of my invention to a radio tube with six current leads 35 issuing from its stem tube 36,-and, incidentally, an additional lead 31 extending out through the top of the bulb and attached as usual to a cap 38.

The sealed bulb end 39 is shown molded (as in Figs. 1, 2 and 5) to afford a flat axially squared surface 40 for the attachment of the disc 4 I. This disc 4|.has six wings or arms 42, a snug center hole f or the projecting exhaust-tubestud or spur 43, and lead-wire slits 44 (one for each wing as in Figs. 1-3 and 5) to assure separation of the numerous leads within the stem tube 36 when drawn f taut in the outer ends of the slits 44. The wings or arms 42 are preferably arranged in such unbalanced manner (or with such irregularities of angular'spacing) as to facilitate indexing: i. e., so that the tube can only be mounted in a support or socket in one angular relation thereto. Except as otherwise indicated, the construction of the device is like Figs l and 2.

Figs. 8 and 9 illustrate a holding device or socket suitable for the tube of Figs. 6 and 7. Generally similar to the socket deviceof Fig. 4, that of Figs. 8 and 9 has in its insulating base plate 45 a socket hole 46 surrounded by six spring clips 41, suitably located. When too closely crowded together for clips such as 21, 28 in Fig. 4 to be feasible, these clips 41 may be of the more compact type shown r in Fig. 9. This consists of a bent'springy metal strip with a connector portion 48 extending down through a slot in the base to a conductor 43, and a horizontal contact portion 50 connected through a semi-circular portion 5| to another horizontal contact portion 52. The horizontal contact portion 52 is resiliently separable from the horizontal contact portion 50, by spring flexure of the semi-circular portion 5| to admit and grip a wing 42.betwen them. When all six wings are thus engaged and held, the resistance to disengagement is ample, even without anything like the shoulder 30 in Fig. 4; but a similar resistance to disengagement can be provided.

What I claim as new and desire to secure by Letters Patent of the United States, is: 1. An electric device comprising a bulb; a disc having a pluralityof apertures abutting against thebulb end andaffixed thereto, with wing portions projecting outward beyond the bulb end periphery; and current leads issuing from the bulb end extending through different disc apertures and outward on the disc wings, with lateral contacts on said wings connected to said leads.

2. An electric device comprising a bulb with an exhaust tube projecting from its end and leads sealed in said end; and'an apertured disc afiixed to said bulb end around said exhaust tube and affording wings. which project outward beyond the bulb end periphery and have lateral contactsconnected to the said leads.

3. An electric device comprising a bulb with a stud projecting from its end; an apertured disc affixed to said bulb end around said stud and slitted outward from its aperture, and also hav- -ing wings which projectoutward beyond the afiixed to said bulb end around said stud afiording end-notched wings which project outward beyond the bulb-end periphery;' and current leads issuing from the bulb end extending outward to the end notches of said wings, and hooked into said notches.

5. The combination of an electric device comprising a bulb with wings on its end projecting outward from the bulb end periphery, a stud projecting from said bulb. end and centrally located with respect to said wings, and lateral contacts on said wings, and a holder having a pivot hole for said stud, and contact clips for holding said wingsand making electrical connection to their said contacts, said wings being engageable with said clips by turning the said as a pivot in said hole.

6. An electric device of the class described comprising a bulb having leads sealed in an end wall thereof, a disc of insulating material abutting device on said stud against the said end of said bulb and afllxed thereto, said disc having integral wing portions projecting outward beyond the bulb end periphery, and contacts on said wings connected to said leads.

7. An electric device of the class described comprising a bulb having leads sealed in an end wall thereof, a disc of insulating material abutting against the said end of said bulb and aflixed thereto, said disc having integral wing portions projecting outward beyond the bulb end periphery, and said leads extending outward on said wing portions and secured thereto to serve as contacts. J

8. An electric device of the class described comprising a bulb having leads sealed in an end wall thereof and a stud projecting from said end, an apertured disc of insulating material abutting against the said end of said bulb and aiiixed thereto around said stud, said disc having integral wing portions projecting outward beyond the bulb end periphery, and contacts on said 10 wings connected to said leads.

HAROLD D. BLAKE. 

